/*
 * Copyright (C) 2011 Thomas Akehurst
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
/*
 * Copyright (C) 2017 Arjan Duijzer
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.github.tomakehurst.wiremock.servlet;

import com.github.tomakehurst.wiremock.http.*;
import com.google.common.base.Function;
import com.google.common.collect.FluentIterable;
import com.google.common.io.ByteStreams;

import javax.servlet.http.Part;
import java.io.IOException;
import java.util.Collection;

import static com.github.tomakehurst.wiremock.common.Exceptions.throwUnchecked;

public class WireMockHttpServletMultipartAdapter implements Request.Part {

    private final Part mPart;
    private final HttpHeaders headers;

    public WireMockHttpServletMultipartAdapter(final Part servletPart) {
        mPart = servletPart;
        Iterable<HttpHeader> httpHeaders = FluentIterable.from(mPart.getHeaderNames()).transform(new Function<String, HttpHeader>() {
            @Override
            public HttpHeader apply(String name) {
                Collection<String> headerValues = servletPart.getHeaders(name);
                return HttpHeader.httpHeader(name, headerValues.toArray(new String[headerValues.size()]));
            }
        });

        headers = new HttpHeaders(httpHeaders);
    }

    public static WireMockHttpServletMultipartAdapter from(Part servletPart) {
        return new WireMockHttpServletMultipartAdapter(servletPart);
    }

    @Override
    public String getName() {
        return mPart.getName();
    }

    @Override
    public HttpHeader getHeader(String name) {
        return headers.getHeader(name);
    }

    @Override
    public HttpHeaders getHeaders() {
        return headers;
    }

    @Override
    public Body getBody() {
        try {
            byte[] bytes = ByteStreams.toByteArray(mPart.getInputStream());
            HttpHeader header = getHeader(ContentTypeHeader.KEY);
            ContentTypeHeader contentTypeHeader = header.isPresent() ?
                new ContentTypeHeader(header.firstValue()) :
                ContentTypeHeader.absent();
            return Body.ofBinaryOrText(bytes, contentTypeHeader);
        } catch (IOException e) {
            return throwUnchecked(e, Body.class);
        }
    }

}
